I don't understand this script, what does bash script do? You could put the echo on the same line with a semi-colon, ie,
Do you mean 1 2 3 4 to be options? If so I'd do
Setup Info:
This User Id and Password mention below are being used with the ISQL command to connect to a sybase database so they are likely to not be the same as those that were signed on from the session.
Situation:
Using a korn shell, the shell prompts for a User Id and Password. During the... (1 Reply)
I am developing a script that will run with '/bin/ksh' shell.
The script is intended to receive a password by keyboard input, but for security reasons I would like to hide what the user is typing.
The keyboard input is being caught by 'read' command.
exmaple :
echo "Please type your new... (1 Reply)
Hi,
I need a way to detect the up and down arrow key inputs for my program. I do not want to wait for the return key to be entered(so that rules out getch() and family). Also I need to process several of these inputs in parallel, by servicing each request with a thread.
Is that possible?
... (4 Replies)
Does anyone know how do you determine the user idle time of STDIN in order to log the user out for being idle too long. I would like to write a c program to do this but I it is not clear upon how to determine idle time from keyboard input. I have found that the "who.c" source file uses the last... (4 Replies)
> sed ''
Hello
hi
Hello output
How
hi output
^D
How
>
sed should take each line as input, process and output the result. In the above scenario the input is passed from keyboard and the output of 'Hello' as you can see is displayed on the screen after 'hi' is passed as input but not as... (1 Reply)
Hello,
i`m trying to create an network monitoring script and i dont know how to make affect that script by pressing an key from keyboard and that script runs not in while or for or any other loop, but with bash command watch
for example: i have created an file (for example check) with content... (0 Replies)
Hi,
I am working on a script, which requests users to enter input.
Ex: read -p "Please enter your email id:" email
I don't want users skipping this entry, this has to be mandatory.I dont want to proceed without input.
I can do a check if variable $email is empty and proceed if not.But, i... (7 Replies)
I would like to make a function or command that checks for keyboard input without interrupting the program and exits the program when a key is pressed (perhaps the 'q' key).
The program below monitors and prints/executes commands upon a change in primary (mouse selection) or clipboard buffer. If... (4 Replies)
Discussion started by: bedtime
4 Replies
LEARN ABOUT PHP
eval
EVAL(3) 1 EVAL(3)eval - Evaluate a string as PHP codeSYNOPSIS
mixed eval (string $code)
DESCRIPTION
Evaluates the given $code as PHP.
Caution
The eval(3) language construct is very dangerous because it allows execution of arbitrary PHP code. Its use thus is discouraged.
If you have carefully verified that there is no other option than to use this construct, pay special attention not to pass any user
provided data into it without properly validating it beforehand.
PARAMETERS
o $code
- Valid PHP code to be evaluated. The code mustn't be wrapped in opening and closing PHP tags, i.e. 'echo "Hi!";' must be passed
instead of '<? echo "Hi!"; >'. It is still possible to leave and reenter PHP mode though using the appropriate PHP tags, e.g.
'echo "In PHP mode!"; ?>In HTML mode!<? echo "Back in PHP mode!";'. Apart from that the passed code must be valid PHP. This
includes that all statements must be properly terminated using a semicolon. 'echo "Hi!"' for example will cause a parse error,
whereas 'echo "Hi!";' will work. A return statement will immediately terminate the evaluation of the code. The code will be exe-
cuted in the scope of the code calling eval(3). Thus any variables defined or changed in the eval(3) call will remain visible
after it terminates.
RETURN VALUES eval(3) returns NULL unless return is called in the evaluated code, in which case the value passed to return is returned. If there is a
parse error in the evaluated code, eval(3) returns FALSE and execution of the following code continues normally. It is not possible to
catch a parse error in eval(3) using set_error_handler(3).
EXAMPLES
Example #1
eval(3) example - simple text merge
<?php
$string = 'cup';
$name = 'coffee';
$str = 'This is a $string with my $name in it.';
echo $str. "
";
eval("$str = "$str";");
echo $str. "
";
?>
The above example will output:
This is a $string with my $name in it.
This is a cup with my coffee in it.
NOTES
Note
Because this is a language construct and not a function, it cannot be called using variable functions.
Tip
As with anything that outputs its result directly to the browser, the output-control functions can be used to capture the output of
this function, and save it in a string (for example).
Note
In case of a fatal error in the evaluated code, the whole script exits.
SEE ALSO call_user_func(3).
PHP Documentation Group EVAL(3)